Import on Python 3.12 generates syntax warnings that will fail in the future

[rmpinchback]

Expected Behavior

For "import pydtmc" to just quietly succeed.

Current Behavior

The following message is printed after import (where '$PROJECTDIR' is just eliminated noise on the base directory):

$PROJECTDIR.venv\Lib\site-packages\pydtmc\markov_chain.py:1624: SyntaxWarning: invalid escape sequence '\g'
| :math:p_{new} = (1 - \gamma) p_{current} + \gamma p_{other}
$PROJECTDIR.venv\Lib\site-packages\pydtmc\utilities.py:174: SyntaxWarning: invalid escape sequence '\m'
models_names = [f'$\mathregular{{{models_label}_{index + 1}}}$' for index, model in enumerate(models)]
$PROJECTDIR.venv\Lib\site-packages\pydtmc\plotting.py:1423: SyntaxWarning: invalid escape sequence '\m'
headers = ["$\mathregular{T_0}$"] + [hmm.symbols[symbol] for symbol in gts_symbols[1:]]

Steps to Reproduce

1. Install Python 3.12
2. Add "pydtmc==8.7.0" to a requirements file and install.
3. import pydtmc

Environment

Python 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)] on win32

• Application Version:

pydtmc==8.7.0

• Operating System:

win32

Possible Solution

I believe this indicates that a level of backslashing is missing from a string, so that needs fixing or perhaps just prefixing a string to indicate it is raw.

[rmpinchback]

Oh and I should have noted that adding 8.7.0 to a requirements file will tend to complain about matplotlib versions if one of those is pinned. PyDTMC is constraining that pretty far back in the matplotlib version history (almost 2 years). Probably not related to the issue here, but just in case this had something to do with an interaction with feeding latex strings to matplotlib, the same project requirements had matplotlib==3.7.3